Clean up availability attributes.
Clean up availability attributes.

kishikawakatsumi/KeychainAccess,sonsongithub/KeychainAccess,ikesyo/KeychainAccess,sonsongithub/KeychainAccess,mspasov/KeychainAccess,colemancda/KeychainAccess,colemancda/KeychainAccess,ikesyo/KeychainAccess,colemancda/KeychainAccess,sonsongithub/KeychainAccess,kishikawakatsumi/KeychainAccess,kishikawakatsumi/KeychainAccess,mspasov/KeychainAccess,ikesyo/KeychainAccess